64-bit cleanness: Yet more UInt-->SizeT changes.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2910 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/memcheck/mac_shared.h b/memcheck/mac_shared.h
index d9a84ab..88deee5 100644
--- a/memcheck/mac_shared.h
+++ b/memcheck/mac_shared.h
@@ -60,8 +60,8 @@
 typedef
    struct {                   // Used by:
       AddrKind akind;         //   ALL
-      Int blksize;            //   Freed, Mallocd
-      Int rwoffset;           //   Freed, Mallocd
+      SizeT blksize;          //   Freed, Mallocd
+      SSizeT rwoffset;        //   Freed, Mallocd
       ExeContext* lastchange; //   Freed, Mallocd
       ThreadId stack_tid;     //   Stack
       Bool maybe_gcc;         // True if just below %esp -- could be a gcc bug.